Handle online and offline redirects via interceptor and offline scheme

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include <stdint.h>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 82 matching lines @@
 #endif
 
 #if defined(USE_SYSTEM_PROTOBUF)
 #include <google/protobuf/repeated_field.h>
 #else
 #include "third_party/protobuf/src/google/protobuf/repeated_field.h"
 #endif
 
 #if BUILDFLAG(ANDROID_JAVA_UI)
 #include "chrome/browser/android/intercept_download_resource_throttle.h"
+#include "chrome/browser/android/offline_pages/offline_page_request_handler.h"
 #endif
 
 #if defined(OS_ANDROID)
 #include "chrome/browser/renderer_host/data_reduction_proxy_resource_throttle_android.h"
 #include "components/navigation_interception/intercept_navigation_delegate.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/login/signin/merge_session_resource_throttle.h"
 #include "chrome/browser/chromeos/login/signin/merge_session_throttling_utils.h"
@@ skipping 267 matching lines @@
 
     // If prefetch is disabled, kill the request.
     std::string prefetch_experiment =
         base::FieldTrialList::FindFullName("Prefetch");
     if (base::StartsWith(prefetch_experiment, "ExperimentDisable",
                          base::CompareCase::INSENSITIVE_ASCII)) {
       return false;
     }
   }
 
+#if defined(OS_ANDROID)
+  // Offline URL cannot be loaded as non-main resource.
+  if (resource_type != content::RESOURCE_TYPE_MAIN_FRAME &&
+      url.SchemeIs(chrome::kOfflinePageScheme)) {
+    return false;
+  }
+#endif
+
   return true;
 }
 
 void ChromeResourceDispatcherHostDelegate::RequestBeginning(
     net::URLRequest* request,
     content::ResourceContext* resource_context,
     content::AppCacheService* appcache_service,
     ResourceType resource_type,
     ScopedVector<content::ResourceThrottle>* throttles) {
   if (safe_browsing_.get())
@@ skipping 65 matching lines @@
                                     resource_context,
                                     resource_type,
                                     throttles);
   }
 #endif
 
   if (io_data->resource_prefetch_predictor_observer()) {
     io_data->resource_prefetch_predictor_observer()->OnRequestStarted(
         request, resource_type, info->GetChildID(), info->GetRenderFrameID());
   }
+
+#if defined(OS_ANDROID)
+  offline_pages::OfflinePageRequestHandler::InitializeHandler(
+      request, resource_type);
+#endif
 }
 
 void ChromeResourceDispatcherHostDelegate::DownloadStarting(
     net::URLRequest* request,
     content::ResourceContext* resource_context,
     int child_id,
     int route_id,
     bool is_content_initiated,
     bool must_download,
     ScopedVector<content::ResourceThrottle>* throttles) {
@@ skipping 364 matching lines @@
     data->SetDataReductionProxyData(data_reduction_proxy_data->DeepCopy());
   return data;
 }
 
 std::unique_ptr<net::ClientCertStore>
 ChromeResourceDispatcherHostDelegate::CreateClientCertStore(
     content::ResourceContext* resource_context) {
   return ProfileIOData::FromResourceContext(resource_context)->
       CreateClientCertStore();
 }